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Contec SPI-6941-LV - Page 37

Contec SPI-6941-LV
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CHAPTER 3 – J
u
mpe
r
S
etti
n
g
32 SPI-6941-LV
3
.
3
.
2
R
S
-
485
S
e
tt
i
ng
R
TS
#
J
P
4
:
7
-
8
T
X
D
#
J
P
3
:
7
-
8
J
P
3
:
5
-
6
D
R
R
X
D
#
C
OM
2
1
2
3
4
5
6
7
8
9
J
P
4
:
5
-
6
J
P
4
:
4
-
6
120 Ω
120 Ω
D
A
T
A
-
D
A
T
A
+
I
/
O
add
r
e
ss
e
s
a
n
d i
n
s
t
r
u
ctio
n
s
The table below lists I/O addresses for use as COM2.
I/
O
a
dd
r
ess
D
L
AB R
ea
d
/
W
r
i
t
e
R
e
g
i
s
t
e
r
W
T
r
an
s
m
i
tt
e
r
ho
l
d
i
ng
R
eg
i
s
t
e
r
T
HR
0
R R
e
c
e
i
v
e
r
bu
ff
e
r
R
eg
i
s
t
e
r
R
B
R
02
F
8
H
1
W
D
i
v
i
s
o
r
l
a
t
c
h
R
eg
i
s
t
e
r
(
L
SB
)
D
LL
1
W
D
i
v
i
s
o
r
l
a
t
c
h
R
eg
i
s
t
e
r
(
M
SB
)
D
LM
02
F
9
H
0
W
I
n
t
e
rr
up
t
enab
l
e
R
eg
i
s
t
e
r
I
E
R
02
F
A
H
X
R
I
n
t
e
rr
up
t I
D
R
eg
i
s
t
e
r
II
R
02
F
B
H
X
W
L
i
ne
c
on
t
r
o
l
R
eg
i
s
t
e
r
L
CR
02
F
CH
X
W
Modem
C
on
t
r
o
l
R
eg
i
s
t
e
r
M
CR
02
F
DH
X
R
L
i
ne
s
t
a
t
u
s
R
eg
i
s
t
e
r
L
S
R
02
F
E
H
X
R
Modem
S
t
a
t
u
s
R
eg
i
s
t
e
r
M
S
R
02
FF
H
X
R
/
W
S
c
r
a
t
c
h
R
eg
i
s
t
e
r
S
CR

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